Engine Control Module (ECM) C2

WARNING: This page is about a different car, the 2007 GMC Envoy, 2007 Chevrolet TrailBlazer, and 2007 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Control Module (ECM) C2 Connector End View

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) C2 Connector Parts Information

Connector Part Information

OEM: 15499466 (Early Production)/13574286 (Late Production)
Service: 88988931
Description: 73-Way F Receptacle 0.64 2.8 Series Sealed (BK) (Early Production)/48-Way F Recptacle 0.64 Series Sealed (BK) (Late Production)

Terminal Part Information-

Pins: 1-5, 11-13, 16-19, 32-35, 42, 48-49, 52-55, 62, 67-72
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 6-9, 23-24, 27, 29, 39-40, 43-44, 59-60, 63-64, 66
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 73
Terminal/Tray: See Terminal Repait Kit
Core/Insulation Crimp: See Terminal Repait Kit
Release Tool/Test Probe: See Terminal Repait Kit

Engine Control Module (ECM) C2 Connecter Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	PU	2121	IC 1 Control
2	TN	1664	HO2S Low Signal - Bank 1 Sensor 1
3	PU/WH	1665	HO2S High Signal - Bank 1 Sensor 1
4	PU/WH	1668	HO2S High Signal - Bank 1 Sensor 2
5	TN/WH	1669	HO2S Low Signal - Bank 1 Sensor 2
6	L-BU	1876	Knock Sensor 2 Signal
7	GY	2303	Knock Sensor Signal
8	D-BU	496	Knock Sensor 1 Signal
9	GY	1716	Knock Sensor Signal
10	-	-	Not Used (Early Production)
10	-	-	Not Available (Late Production)
11	YE	581	TAC Motor Control 1
12	BN	582	TAC Motor Control 2
13	PK	839	Ignition 1 Voltage
14-15	-	-	Not Used (Early Production)
14-15	-	-	Not Available (Late Production)
16	PK/BK	1746	Fuel Injector 3 Control
17	PU/WH	2128	IC 8 Control
18	D-GN/WH	2124	IC 4 Control
19	BN/WH	2130	Low Reference
20-22	-	-	Not Used (Early Production)
20-22	-	-	Not Available (Late Production)
23	BN/WH	633	Low Reference (Early Production)
23	PK/BK	632	Low Reference (Late Production)
24	BK	2755	Low Reference
25-26	-	-	Not Used (Early Production)
25-26	-	-	Not Available (Late Production)
27	D-BU/WH	1869	Low Reference (Early Production)
27	YE/BK	1868	Low Reference (Late Production)
28	-	-	Not Used (Early Production)
28	-	-	Not Available (Late Production)
29	BK/WH	1704	Low Reference
30-31	-	-	Not Used (Early Production)
30-31	-	-	Not Available (Late Production)
32	L-GN/BK	1745	Fuel Injector 2 Control
33	RD	2127	IC 7 Control
34	D-GN	2125	IC 5 Control
35	BN	2129	Low Reference
36-38	-	-	Not Used (Early Production)
36-38	-	-	Not Available (Late Production)
39	RD	631	12-Volt Reference
40	GY	2705	5-Volt Reference
41	-	-	Not Used (Early Production)
41	-	-	Not Available (Late Production)
42	BK	2760	Low Reference
43	L-GN	1867	12-Volt Reference
44	L-BU/BK	1688	5-Volt Reference
45-47	-	-	Not Used (Early Production)
45-47	-	-	Not Available (Late Production)
48	D-BU/WH	878	Fuel Injector 8 Control
49	BK/WH	845	Fuel Injector 5 Control
50-51	-	-	Not Used (Early Production)
50-51	-	-	Not Available (Late Production)
52	YE/BK	846	Fuel Injector 6 Control
53	RD/WH	2122	IC 2 Control
54	L-BU/WH	2126	IC 6 Control
55	L-BU	2123	IC 3 Control
56-58	-	-	Not Used (Early Production)
56-58	-	-	Not Available (Late Production)
59	PK/BK	632	CMP Sensor Signal (Early Production)
59	BN/WH	633	CMP Sensor Signal (Late Production)
60	TN/WH	332	Oil Pressure Sensor Signal
61	-	-	Not Used (Early Production)
61	-	-	Not Available (Late Production)
62	TN	472	IAT Sensor Signal
63	YE/BK	1868	CKP Sensor Signal (Early Production)
63	D-BU/WH	1869	CKP Sensor Signal (Late Production)
64	D-GN	485	TP Sensor 1 Signal
65	-	-	Not Used (Early Production)
65	-	-	Not Available (Late Production)
66	PU	486	TP Sensor 2 Signal
67	YE	492	MAF Sensor Signal
68	BK/WH	3113	HO2S Heater Low Control - Bank 1 Sensor 1
69	BN	2391	HO2S Heater Low Control - Bank 1 Sensor 2
70	L-BU/BK	844	Fuel Injector 4 Control
71	RD/BK	877	Fuel Injector 7 Control
72	BK	1744	Fuel Injector 1 Control
73	BK	450	Ground